The Medial Patellofemoral Ligament Is a Dynamic and Anisometric Structure: An In Vivo Study on Length Changes and Isometry. - Kernkamp, Willem A.; Wang, Cong; Li, Changzou; Hu, Hai; van Arkel, Ewoud R.A.; Nelissen, Rob G.H.H.; LaPrade, Robert F.; van de Velde, Samuel K.; Tsai, Tsung-Yuan (American Journal of Sports Medicine, 2019)